This document provides an overview of Li-Fi technology. It describes Li-Fi as a wireless optical networking technology that uses LED light bulbs to transmit data. The founder of Li-Fi coined the term in 2011 and helped start companies to market the technology. It explains that Li-Fi works by transmitting data through variations in the intensity of light from LED bulbs, which can then be received by photoreceptors. The document outlines some of Li-Fi's advantages like high speed transmission, privacy and security, and low costs, as well as disadvantages such as inability to pass through objects and potential interference from other light sources.

1. Li-Fi
Technology

2. Content
 Introduction
 History
 How Li-Fi Works?
 Real Time Usage of Li Fi
 Comparison between Various Technologies
 How it is different?
 Application
 Advantages
 Disadvantages

3. Introduction
 LiFi is a wireless optical networking technology that
uses light-emitting diodes (LEDs) for data
transmission.
 LiFi is designed to use LED light bulbs similar to
those currently in use in many energy-conscious
homes and offices.
 LiFi data is transmitted by the LED bulbs and received
by photoreceptors.

4. History
 Professor Harald Haas, from the University of Edinburgh in the
UK, is widely recognised as the original founder of Li-Fi.
 He coined the term Li-Fi and is Chair of Mobile Communications
at the University of Edinburgh and co- founder of pureLiFi.
 Haas promoted this technology in his 2011 TED Global talk and
helped start a company to market it.
 In October 2011, companies and industry groups formed the Li-Fi
Consortium, to promote high-speed optical wireless systems.
 The first Li-Fi smartphone prototype was presented at the
Consumer Electronics Show in Las Vegas from January 7–10 in
2014.

5. How Li-Fi Works?

6. Real Time Usage of Li Fi

7. Wi-Fi 150 Mbps
Bluetooth 3 Gbps
IrDA 4 Gbps
Comparision between various Technologies
Wired
Wireless(Current)
Wireless(Future)
Fire wire 800 Mbps
USB 3.0 5 Gbps
Thunderbolt 20 Gbps
Li-Fi 10 Gbps
Giga-IR 1 Gbps
Wi-Gig 2Gbps

8. How it is different?
 Li-Fi technology is based on LEDs for the transfer of data.
 The transfer of the data can be with the help of all kinds of
light, no matter the part of the spectrum that they belong.
 That is, the light can belong to the invisible, ultraviolet or the
visible part of the spectrum.

9. Applications
 You Might Just Live Longer
 Airlines
 Smarter Power Plants
 Undersea Awesomeness
 It Could Keep You Informed and Save Lives

10. Advantages of LI-FI
 Li-Fi can solve problems related to the insufficiency of radio
frequency bandwidth because this technology uses Visible light
spectrum that has still not been greatly utilized.
 High data transmission rates of up to 10Gbps can be achieved.
 Since light cannot penetrate walls, it provides privacy and
security that Wi-Fi cannot.
 Li-Fi has low implementation and maintenance costs.

11. Disadvantage
 Light can't pass through objects.
 A major challenge facing Li-Fi is how the receiving device will
transmit back to transmitter.
 High installation cost of the VLC systems.
 Interferences from external light sources like sun, light, normal
bulbs, .

12. Thank You!...